Zinc stearate is mainly used as a wood primer in paints to act as a filler and improve the sandability. It has good transparency and affects the transparency of the coating, especially for transparent primers. Zinc stearate manufacturers have two production processes: double decomposition and melting. In general, the zinc stearate produced by the water process is acidic, and the melting process is alkaline.

The double decomposition method, also called the wet method, adds a catalyst under the condition of water as a medium, controls a certain temperature and pressure, then adds a metal hydroxide, replaces the metal ion to the catalyst through the catalyst, and then replaces the stearine through the catalyst itself. Acid, so as to achieve the purpose of generating metal salts. After the catalyst has been processed and recycled, it is recycled. Stearic acid salt is centrifuged, dried and ground to obtain a product with a mesh size of 200-600 mesh that meets industry standards. The aqueous process usually produces a slight excess of stearic acid, so the finished product becomes acidic after the reaction.

Melting method, also known as dry method, refers to the direct addition of metal oxides in the molten stearic acid (of course, in the presence of a catalyst, otherwise the conversion of the reaction will be very long and long) to control a certain temperature and pressure. Stirring speed gives stearate by reaction. The products produced by the dry process can be completely reacted due to the presence of the catalyst, and the metal oxide is slightly excessive, so the product is alkaline when tested.